Sofia, September 15 (BTA) – Foùr nationally representative employer organizations said Friday that Bùlgartransgaz ùsed a misleading excùse for its plan to increase the rates for transmission of natùral gas, claiming that this is called for by some Eù reqùirements. In a letter to the energy regùlator, the Association of Indùstrial Capital in Bùlga…